Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15c59fc29e9e50b…

MALICIOUS

PDF

353.4 KB Created: 2015-08-25 16:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 3a1a81b29d625991c8121e8b52eacb47 SHA-1: f92755d93437bdc9306da4086e189ed5674791cb SHA-256: b15c59fc29e9e50bbe017261440b16458d2c7691000ef700fa30688f310aa8e6
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL is sufficient to classify the attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 2

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://botcraftman.ru/?lip&keyword=%D0%B1%D0%BE%D1%82+%D0%BD%D0%B0+%D0%BD%D1%8B%D1%87%D0%BA%D0%B8+%D0%B2+%D1%82%D1%8E%D1%80%D1%8F%D0%B3%D0%B5&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4733/4733600_delphi__7__skachat_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4732/4732597_skachat__programmu__dlya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731977_yekspressobuchenie__igre__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054323.bin
0d54a85928343254a3c475083dd4af11163414fd1527ba6e8341ecba4bd551b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54323 8000 bytes
font_01_sfnt_off00055a0e.bin
d0ce2b1b69c792c7691b630b44adfd4015c509ff62c04cce6243229487ef34f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55A0E 14064 bytes

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